Join ExamsbookAnswer : 4. "Jonas E Salk"
The first effective vaccine against polio was prepared by ?5
Q: The first effective vaccine against polio was prepared by ?
- 1Robert Edwardsfalse
- 2James Simpsonfalse
- 3H Gibbonfalse
- 4Jonas E Salktrue
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Answer : 4. "Jonas E Salk"
Explanation :
Answer: D) Jonas E Salk Explanation: